Shimonoseki is a city located in Yamaguchi Prefecture, Japan., the city had an estimated population of 248,193 in 128762 households and a population density of 350 persons per km². The total area of the city is 716.18 sqkm. It is the largest city in Yamaguchi Prefecture and the fifth-largest city in the Chūgoku region in terms of population. It is nicknamed the "Fugu Capital" for the locally caught pufferfish, and is the largest harvester of the pufferfish in Japan.